1. 根据答语填疑问词。

1. （1） A: does your brother usually go to bed?

   B: At 9:00.

3. （2） A: do you like best?

   B: Ping-pong.

5. （3） A: do you go to school?

   B: I go to school by bus.

7. （4） A: is your little sister?

   B: Lucy.

9. （5） A: is your house?

   B: It's next to the post office.